The Q-START (Quick Start) function makes it possible to minimise tacking time. A series of adjustable duration pulses creates a movement of molten material between the two edges in order to accelerate the join. This function is invaluable in the case of seams with slight openings or with irregular preparation.The alternation of high and low current pulses constantly changes the electric arc geometry from wide to narrow. Movement of the molten material, which follows the arc geometr y, is such that the two molten edges are rapidly brought into contact. The duration of the series of pulses can be adjusted, from 0.1 to 10seconds depending on the thickness and shape of the base material. This function is only available in DC welding of Stainless Steel and Carbon Steels.
Q-START result consist in a more rapid start of the welding process. When it is used for the tacking, it is possible to obtain very clear spots without any oxidation stains.
THE DYNAMIC ARC
The Dynamic Arc function allows an increase of the welding current when the arc voltage decreases and vice versa (the power source reduces the welding current if the arc voltage increases). The DynamicArc value can be adjusted from a minimum of 10 Ampere to a maximum of 50 Ampere per each variation of 1 Volt, whether positive or negative. This value must be set in accordance with the thickness of the base material, and the type of processing that has to be carried out (recommended values between 1A and 20A for thin gauges and values between 20A and 50A for thicker gauges). It follows that in spite of the arc length variations the energy absorption remains constant. This function is only available in DC welding of Stainless Steel and Carbon Steels.
TIG DC STANDARD WELDING
DYNAMIC ARC TIG DC WELDING
DYNAMIC ARC BENEFITS
The Dynamic Arc function permits the welding with extremely short arcs. When the electrode is very close to the base material, the current increase avoids the contact by the shifting of the welding pool. This prevents both the electrode’s sticking at the material and the inclusion of tungsten’s particles on the deposit.
- Faster welding
- Reduced plastic deformation of the welded part
- Increased vertex penetration
- Heat concentrated only at the point of the weld and not in the surrounding area
- Less oxidation of the part and hence reduced cost of post welding operations
- Improved control of the first root pass (helpful for plumbers and plant engineers)
- Less risk of electrode sticking when it touches the weld puddle
- Easy welding also on irregular preparated pieces
- Reduced margin of error and increased arc stability in spite of torch moving variation
- Through the combination between Pulse and High frequency it is possible the obtaining of a very focused arc with higher power density.
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